LM74700MDDFREP datasheet(5/32 Pages) TI

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6.4 Thermal Information

THERMAL METRIC(1)

LM74700-EP

UNIT

DDF (SOT)

8 PINS

RθJA

Junction-to-ambient thermal resistance

189.8

°C/W

RθJC(top)

Junction-to-case (top) thermal resistance

103.8

°C/W

RθJB

Junction-to-board thermal resistance

45.8

°C/W

ΨJT

Junction-to-top characterization parameter

19.4

°C/W

ΨJB

Junction-to-board characterization parameter

45.5

°C/W

(1)

For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application

report, SPRA953.

6.5 Electrical Characteristics

TJ = –55°C to +125°C; typical values at TJ = 25°C, V(ANODE) = 12 V, C(VCAP) = 0.1 µF, V(EN) = 3.3 V, over operating free-air

temperature range (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

VANODE SUPPLY VOLTAGE

V(ANODE)

Operating input voltage

V(ANODE POR)

VANODE POR Rising threshold

3.9

VANODE POR Falling threshold

2.2

2.8

3.1

V(ANODE POR(Hys))

VANODE POR Hysteresis

0.39

0.7

I(SHDN)

Shutdown Supply Current

V(EN) = 0 V

0.9

1.5

µA

I(Q)

Operating Quiescent Current

140

µA

VANODE = 28 V

150

µA

ENABLE INPUT

V(EN_IL)

Enable input low threshold

0.5

0.9

1.22

V(EN_IH)

Enable input high threshold

1.06

2.6

V(EN_Hys)

Enable Hysteresis

0.52

1.42

I(EN)

Enable sink current

V(EN) = 12 V

µA

VANODE to VCATHODE

V(AK REG)

Regulated Forward V(AK) Threshold

VANODE = 28 V

V(AK)

V(AK) threshold for full conduction

mode

V(AK REV)

V(AK) threshold for reverse current

blocking

–17

–11

–5

VANODE = 28 V

–17

–11

–5

Regulation Error AMP

Transconductance(1)

440

1800

4900

µA/V

GATE DRIVE

I(GATE)

Peak source current

V(ANODE) – V(CATHODE) = 100 mV,

V(GATE) – V(ANODE) = 5 V

Peak sink current

V(ANODE) – V(CATHODE) = –20 mV,

V(GATE) – V(ANODE) = 5 V

2370

Regulation max sink current

V(ANODE) – V(CATHODE) = 0 V,

V(GATE) – V(ANODE) = 5 V

µA

RDSON

discharge switch RDSON

V(ANODE) – V(CATHODE) = –20 mV,

V(GATE) – V(ANODE) = 100 mV

0.4

Ω

CHARGE PUMP

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LM74700-EP

SNOSDD6 – SEPTEMBER 2021

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